R-134A IN STOCK PATENTED SHIPS FAST

Seal your A/C port leak in under 30 seconds.
No tools. No mechanic.

Service port valve leaks are behind an estimated 40–60% of slow A/C refrigerant leaks. FreezeCap™ locks over the service port and creates a secondary seal that contains refrigerant escaping past a worn Schrader valve. 150+ ports sealed. Built and tested in Florida heat. Ships fast from Texas.

Seal my port leak for $97 → See how it works
Lifetime warranty
30-day money back
Ships free from TX
Patented technology

DIAGNOSE FIRST · BUY SECOND

Most slow A/C leaks have one thing in common.

If you've recharged refrigerant more than once this season, you don't have an A/C problem. You have a leak. Roughly 40–60% of slow leaks originate at one spot: the service port. Run through the symptoms below. The more that match, the more likely the port is your source.

Recharge cycle

You've added refrigerant more than once this season and the cold air keeps fading.

Hissing at the port

You hear a faint hiss when you uncap the service ports, or when you try to attach a recharge can.

Schrader replacement failed

You replaced the Schrader valve and the leak returned, often because the replacement process damages the port threads.

Soapy bubbles at the port

Spray soapy water on the port with the system charged. Slow bubbles forming at the rim or under the cap = port leak.

Symptoms point somewhere else? FreezeCap™ won't fix compressor, condenser, evaporator, or hose leaks. It's still a rim-sealed upgrade over the brittle plastic cap your port came with, and it confirms the port isn't your leak source. If the refrigerant still leaks after install, you've narrowed the problem and saved a $150 shop diagnostic.

UNDER THE HOOD

Here's what to look for. Tap a marker.

We marked the three spots that matter on a typical engine bay. Find them on yours before you order.

Vehicle under hood with the A/C service port labeled

Engine bays vary, but the low-pressure service port is always the slightly smaller port.

THE MECHANISM · WHY IT WORKS

Standard fixes try to repair the port. FreezeCap™ contains the leak.

A service port has two failure points: the internal Schrader valve and the external port threads. Replacing the valve can damage the threads further. FreezeCap™ is the patented solution that locks over the service port and creates a secondary seal, containing refrigerant escaping past a worn Schrader valve.

01

Standard caps are dust covers, not seals.

The plastic cap that came with your car acts more as a dust cover. It doesn't seal the refrigerant system well. If your Schrader valve is worn or the port threads are damaged, that cap won't stop the leak. Refrigerant keeps escaping every time the system pressurizes.

02

Replacing the valve can damage the port.

Port threads are soft aluminum. Removing and re-seating a Schrader valve often scratches or deforms the threads. That's why the leak sometimes returns worse than it started. The act of "fixing" creates the next leak.

03

FreezeCap™ creates a secondary seal over the port.

The patented geometry locks over the service port opening and forms a secondary seal, containing any refrigerant that escapes past a compromised Schrader valve. The leak gets trapped in the system instead of bleeding to atmosphere. Nothing to break, nothing to clog. Sealed in under 30 seconds.

PATENTEDBacked by a U.S. utility patent covering the secondary-seal geometry that makes this work.

INSTALL · 30 SECONDS · NO TOOLS

Three steps. Thirty seconds. No tools.

Confirmed it's a port leak? Here's the install. Three steps, no tools, no opening the refrigerant system.

1

Unscrew the old cap.

Pop the hood and find the service ports. They sit on the A/C lines and are usually capped in blue, red, or black. Recharge if necessary (R-134a or R-1234yf, whichever your vehicle uses).

• Two service ports · driver or passenger bay
2

Push it on, then twist the top.

Push FreezeCap™ straight down onto the service port. The quick-release clamp engages with an audible click. Twist the top dial to seal against the port rim.

• Push to clamp · twist to seal
3

Drive.

That's it. No vacuum pump, no shop equipment, no risk of damaging your system, and no waiting three days for an appointment.

• Cold air restored · no monthly refrigerant top-offs

FOR SERVICE PORT LEAKS

$97 once vs. recurring repair bills.

Slow port leaks compound. Recurring fixes (recharge cans, stop-leak, repeat shop visits) keep costing every season. FreezeCap™ is once-and-done.

FreezeCap™

Recommended

Seals the port leak at the rim. No tools, no additives, no system contact. Diagnostic value if leak is elsewhere.

$97 onceNo system risk

ALTERNATIVES

Recharge kit refills

Temporary

Masks the leak. Refrigerant escapes again, requiring repeat purchases every few weeks or months.

$50–$200 / 3 yrsDoesn’t fix root cause

Schrader valve replacement

Risky DIY

May worsen the leak: port threads are soft and often damaged further during removal. Requires tools and vacuum + recharge.

$150–$450 / 3 yrsPort damage common

Full A/C line replacement

Overkill

Fixes the leak but unnecessary for a port-only problem. Days of downtime, mechanic required.

$600–$2000 onceEffective but excessive

Stop-leak additive

Avoid

Circulates through the system and can clog the expansion valve or compressor. Most mechanics won’t service a treated system. Risk of total A/C failure.

$30–$100 / 3 yrsSystem damage risk

Ranges sourced from RepairPal, YourMechanic. Stop-leak risk per MACS industry guidance.

VERIFIED COST COMPARISON

The other four options cost more, and most don't contain the leak.

Real-world cost ranges for a slow service-port leak, pulled from shop aggregators (RepairPal, YourMechanic) and parts retailers (AutoZone, O'Reilly). Traditional repairs can be expensive. FreezeCap™ is the affordable first step, and the diagnostic that tells you whether you need anything more.

Option
Cost
Contains the leak?
DIY?
FreezeCap™ RECOMMENDED
$97 once
✓ Yes, port only
Yes · 30 sec
Recharge kit refills
$50–$200 / 3 yrs
✗ No, masks symptom
Yes
Schrader valve replacement
$150–$450 / 3 yrs
Sometimes
Risky
Full A/C line replacement
$600–$2,000 once
✓ Yes, but overkill
No
Stop-leak additive
$30–$100 / 3 yrs
Temporarily
Yes

The math on most ports: two refrigerant cans this season already cost you more than FreezeCap™. By winter, you'll have spent triple.

COMPATIBILITY CHECK

Will it fit your vehicle? Type your year and make.

FreezeCap™ comes in two refrigerant types: R-134a (most 1994–2012) and R-1234yf (most 2021 and newer). 2013–2020 is the mixed transition window: verify yours by the under-hood sticker, owner's manual, or VIN lookup. Together they cover 95%+ of vehicles on US roads.

Not sure which refrigerant your car uses? Check (1) your owner's manual, (2) the A/C system sticker on or near the radiator under the hood, or (3) a quick web search of your year, make, and model.

Fill in your vehicle to check refrigerant type and recommended FreezeCap™ model.

FreezeCap™ works on any vehicle with a standard Schrader-valve service port.

  • Covers 95%+ of vehicles on US roads
  • R-134a: 1994–2012 vehicles (almost universal)
  • R-1234yf: 2021 and newer (EPA mandate for new vehicles)
  • 2013–2020 is the mixed transition window: verify before ordering
  • Best sources: owner's manual, sticker on or near the radiator, or a quick web search
Get FreezeCap™ for $97 →

WHAT CUSTOMERS SAY

150+ ports sealed.
Most in 30 seconds.

Verified buyer reviews from Judge.me. Read every review on the product page.

Customer Reviews

Based on 3 reviews
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M
McGowan Anderson
Surprised by the results of switching out the caps

It is actually blowing cold air and this was a pleasant surprise. Very impressed with this product

J
John C.
Outstanding product!

Excellent product, I will be ordering more to put on other vehicles I own. They are very well-made and takes no time at all to install.

H
Henry Murray
So far, so good.

So far, so good. Fitting that failed on my vehicle is N.L.A. If this turns out to be a permanent solution to the leak, it is worth it's weight in gold.

Reviews in Other Languages

THE OFFER

$97 once. Pays for itself the first season.

Refrigerant leaks slowly. One yearly recharge feels harmless, but every recharge means refrigerant is still escaping past a worn Schrader valve. FreezeCap™ contains that leak in the system instead of bleeding to atmosphere, and pays for itself in saved refills, shop fees, and weekend headaches.

  • FreezeCap™ unit (R-134a or R-1234yf), $97
  • Lifetime warranty on seal integrity, included
  • 30-day money-back guarantee, included
  • Free US shipping, ships today, included

The $97 diagnostic guarantee. If you install FreezeCap™ and your system still loses charge, the leak is somewhere else, not the port. You now have a real diagnostic data point worth more than a $150 shop fee. Either way, your $97 is working.

Try it for 30 days. If it doesn't seal your port leak, return it for a full refund. No questions, no restocking fee.

Best value
One-time purchase
FreezeCap™
$ 97 once

vs. $50–$100/month in refrigerant recharges

  • FreezeCap™ unit (your refrigerant type)
  • Lifetime warranty on seal integrity
  • 30-day money-back guarantee
  • Free US shipping · ships from Texas today
Seal my port leak for $97 →

Lifetime warranty · 30-day money back · Free US shipping

QUESTIONS

The questions we get most.

Then FreezeCap™ won't fix it, and that's exactly why we recommend the diagnostic checklist above before ordering. If you install FreezeCap™ and your system still loses charge, you've ruled out the port. That's worth more than a $150 shop diagnostic fee. Either way, the 30-day money-back guarantee covers you.

Three reliable sources, in order: (1) your owner's manual (search for "refrigerant type" or "R-134a / R-1234yf"); (2) the A/C system sticker, usually on or near the radiator core support or under the hood; (3) a quick web search of your year, make, and model. Rule of thumb: 1994–2012 vehicles almost universally use R-134a; 2021 and newer use R-1234yf. 2013–2020 is the transition window: verify by the sticker, manual, or a VIN lookup before ordering.

FreezeCap™ never opens the refrigerant system. It's a mechanical seal on the external port fitting, equivalent to swapping the dust cap that came with your vehicle. No reasonable manufacturer warranty would be affected. If you're under factory warranty and concerned, check your owner's manual or call the dealer service desk.

FreezeCap™ is a recently patented product designed for vehicle owners to install themselves. It isn't yet in standard shop toolkits because shops are equipped for full-system repair, not consumer-installed seals. Many techs we've talked to are glad to learn about it.

Yes. There are no tools, no refrigerant handling, and no torque required. If you can twist a cap off a water bottle, you can install FreezeCap™. Average install time is under 30 seconds. The full step-by-step is in the "How it works" section above.

FreezeCap™ locks over the service port and creates a secondary seal that contains refrigerant escaping past a worn Schrader valve. The leak doesn't get fixed; it gets trapped in the system instead of bleeding to atmosphere. Mechanical, not chemical. Nothing that degrades or washes out. Backed by a lifetime warranty on seal integrity for service port leaks: if a defect ever causes the seal to fail, we replace it for life.

Yes. FreezeCap™ was developed and stress-tested in Florida heat. Engineering tolerances are designed for high-temperature, high-pressure cycling. Hot climates are exactly where the seal is most needed and where we see the strongest customer results.

Email us at support@freezecap.com within 30 days and we'll exchange it free. Better yet, use the fit selector above before checkout. It takes 10 seconds and prevents the swap entirely.